Java case insensitive comparison

Java case-insensitive comparison

1. Java has provided a built-in case judgment Method: equalsIgnoreCase().

Usage: (Recommended tutorial: java tutorial)

"ABC".equalsIgnoreCase("abc"); // 将字符串ABC与abc忽略大小写进行比较

2. Use toLowerCase() Compare with contains

Convert both strings to lowercase for comparison

s1.toLowerCase().contains(s2.toLowerCase());

Extension:

equalsIgnoreCase and The difference between equals

String.equals() is case-sensitive, while String.equalsIgnoreCase() ignores case

For example:

"ABC".equals ("abc") is false

"ABC".equalsIgnoreCase("abc") is true

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